Improvement in sewing-machines



1. w. ,HARDIE.

Sewing Machine.

Patented Dec. 4, 1860.

UNITED STATES PATENT ()FFICE.

JASON V. HARDIE, OF NEWV YORK, N. Y., ASSIGNOR TO JAMES H. STEVENS, OFSAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 30,854, dated December4, ISCO.

To all whom 2'25 may concern:

Be it known that I, JASON W. HARDIE, of New York, in the county of NewYork and State of New York, have invented a new and ImprovedSewing-Machine, and I do hereby declare that the following is a full andexact description thereof, reference being had to the accompanyingdrawings, making part of this specification- Figure 1 being a sideelevation of the machine; Fig. 2, a front elevation thereof; Fig. 3, afront elevation, certain parts of the machine being removed; Fig. 4, asimilar elevation, still other parts being removed; Fig. 5, a sideelevation of a portion of the machine; Fig. 6, a central longitudinalsection of the needle and cone 011 an enlarged scale; Figs. 7 8, 9, and10, detailed views on an enlarged scale, exhibiting the different stepsin the process of forming the stitches.

Like letters designate corresponding parts in all the figures.

My invention relates to single-thread sewing-machines, and to thatparticular class in' which a barbed or hook needle is used for drawingthe thread through the cloth, together with aswinging or vibrating guidefor hooking the thread into the barb of the needle.

The construction of the machine, except in the parts to which myimprovements especially relate, may be in any desired or convenient formand manner.

In the drawings, I have represented a frame or body, A, with a curvedarm, a, above the cloth-plate d, for sustaining the thread-guide andcloth-presser, with projecting arms I) b, for receiving tllumbscrews BB, by which the machine may be clamped to a table or other support, andwith a socket-arm, c, in which the shaft of the winch G anddriving-pulley D turns. For the purpose of compactness and neatness ofconstruction, the curved arm a is made hollow nearly its whole length,to receive therein a rod, E, for giving to the threadguide G itsvibratory movement. The arrangement for producing this movement is shownin Fig. 1. Theguide G swings on a pivot, h, in its upper end, and at asuitable distance below the pivot one end of the rod E is jointed orpivoted to it, as at i. The rod E is also pivoted in the arm (a at 9,while its lower end presses against the hub of the pulley D, whichserves as a cam to give the required movement. The upper arm or portionabove the pivot g is flexible and elastic,

and when the rod is in position it is somewhat the end of the rod E isallowed to spring there in its upper arm becomes somewhat straightened,and consequently lengthened, whereby the guide G is swung forward intothe position shown by red lines in the same figure.

The needle Z is secured in avertical plate, I, which slides in propergrooves in the body A of the machine, and to which the properreciprocating motion for forcing the needle up through the cloth isgiven by means of a crankpin, (m, in the face of a cam, M, on thedriving-shaft,) working in a horizontal groove, 7;, Fig. 2, in saidneedle-plate.

The barb or hook notch y, for receiving the thread, is formed so as notto increase the size of the needle, as shown, and for the pur pose ofclosing the barb-notch, so as not to catch hold of the cloth when theneedle descends or retreats through it, as well as to assist in holdingthe thread therein at the proper times; and in casting off the loop atthe desired moment I employ a pointed piece, 00, arranged and operatingin connection with the needle substantially as follows: This piece, fromits general shape, may be simply termed the cone, for convenience. It isformed or secured on the upper end of a stem orshank, L, which slidesvertically between guides q g, be hind and parallel with theneedle-plate I, and the proper reciprocating movement is given to it bythe cam M and a counter-spring, j, or its equivalent. The upper end ofthe stem L has an aperture, 2, which accurately fits around the needleZ, and thus keeps the cone x in the exact position required under allcircumstances. In the barbed side of the needle is a longitudinalgroove, w, Fig. 6, in which the point of the cone a: slides, thus beingbeneath the surface of the needle, as represented. The

movements of the cone, in connection with those of the needle, will bereadily understood by reference to Figs. 7, 8, 9, and 10. First, theneedle Z ascends to its full height, and the cone with it, till thepoint thereof just reaches up through the cloth V, as indicated in Fig.7. In that position of the parts the thread-guide G (which has thethread '0 strung through an eye in its lower end) vibrates from theposition shown by black lines in Fi 1 to the position shown by red linesin the same figure, and as the thread is held at nearly right anglesacross the path of the guides movement, on one side by the cloth and onthe other side by a threadholder, H, this movement of the guidestretches the thread against the barb ed side of the needle,

as shown in Fig. 7, and holds it there till the needle descends againand catches it in the barb or notch 1 The cone w retains its highestposition till the barb of the needle holding the thread just passes byit, as shown in Fig. 8. Then both needle and cone descend together, thecone thus shutting over the barb, so that it cannot catch. hold of thecloth to the end of the downward movement, as in Fig. 9. Then the needle commences its upward movement, first leaving the cone below the barbtill the loop of the thread is started therefrom by the retreating ofthe needle from it, as shown in Fig. 10. Finally, the cone againcommences its ascent, and thus invariably passes under or within theloop, thereby insuring the forming of every stitch with out thepossibility of fail ure.

The feeding of the cloth along is effected by the motions of a single.piece or feed-bar, 1 and will be understood by referring to Fi 4. Itsfeeding edge, points, or surface, 0, is illtended to press the cloth andmove it against the presser-plate R above. It has a vertical slot, .9,near its center, which allows a longitudinal motion of the feed-bar overa pin-guide, t. A cam-surface, O, on the driving-shaft, works againstthe base at of the feedbar and presses it up against the cloth. Thenanother cam N, on the same shaft, strikes a heel, P, of the feedplatelaterally, and consequently gives the requiredlateral feed motion to theupper end. As the cams N O recede fromthe feed-bar a counterspring, 4',brings it back against a stop, Q, which, being adjustable out or in,varies the extent of vibratory movement given to the feed-bar, andconsequently the length of the stitches. The thread, '0, as it isrendered from the spool, passes through the head of a conical pin orpeg, s, which fits and tightens in ahole in the arm a. By turning thispin the thread is wound around it till the required tension is giventhereto. I

I do not claim a barbed or hook needle, nor a swinging thread-guide inconnection therewith; but

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

The method of communicating the vibratory or swinging movement to thethread-guide G by means of the bent elastic rod E, in combination withthe cam f on the driving-shaft, substantially as herein set forth.

In witness that the above is a true specification of my improvedsewing-machine I hereunto set my hand this 28th day of December, 1859. 0

J ASON XV. HARDIE.

W'itnesses:

S. B. ELL'ITHORP, HENRY L. S'rEvENs.

